active
terms
N
mark
cons
recip
sqr
N
terms
s
N
active
sqr
0
mark
0
active
sqr
s
X
mark
s
add
sqr
X
dbl
X
active
dbl
0
mark
0
active
dbl
s
X
mark
s
s
dbl
X
active
add
0
X
mark
X
active
add
s
X
Y
mark
s
add
X
Y
active
first
0
X
mark
nil
active
first
s
X
cons
Y
Z
mark
cons
Y
first
X
Z
active
terms
X
terms
active
X
active
cons
X1
X2
cons
active
X1
X2
active
recip
X
recip
active
X
active
sqr
X
sqr
active
X
active
add
X1
X2
add
active
X1
X2
active
add
X1
X2
add
X1
active
X2
active
dbl
X
dbl
active
X
active
first
X1
X2
first
active
X1
X2
active
first
X1
X2
first
X1
active
X2
terms
mark
X
mark
terms
X
cons
mark
X1
X2
mark
cons
X1
X2
recip
mark
X
mark
recip
X
sqr
mark
X
mark
sqr
X
add
mark
X1
X2
mark
add
X1
X2
add
X1
mark
X2
mark
add
X1
X2
dbl
mark
X
mark
dbl
X
first
mark
X1
X2
mark
first
X1
X2
first
X1
mark
X2
mark
first
X1
X2
proper
terms
X
terms
proper
X
proper
cons
X1
X2
cons
proper
X1
proper
X2
proper
recip
X
recip
proper
X
proper
sqr
X
sqr
proper
X
proper
s
X
s
proper
X
proper
0
ok
0
proper
add
X1
X2
add
proper
X1
proper
X2
proper
dbl
X
dbl
proper
X
proper
first
X1
X2
first
proper
X1
proper
X2
proper
nil
ok
nil
terms
ok
X
ok
terms
X
cons
ok
X1
ok
X2
ok
cons
X1
X2
recip
ok
X
ok
recip
X
sqr
ok
X
ok
sqr
X
s
ok
X
ok
s
X
add
ok
X1
ok
X2
ok
add
X1
X2
dbl
ok
X
ok
dbl
X
first
ok
X1
ok
X2
ok
first
X1
X2
top
mark
X
top
proper
X
top
ok
X
top
active
X
active
1
terms
1
mark
1
cons
2
recip
1
sqr
1
s
1
0
0
add
2
dbl
1
first
2
nil
0
proper
1
ok
1
top
1
INNERMOST
./TRS/TRCSR/inn/Ex26_Luc03b_C.trs